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TTFields Plus FET-PET-Guided Stereotactic Radiosurgery Versus TTFields Alone for Recurrent Glioblastoma (Tarrget 2.0)

19. Juni 2026 aktualisiert von: Maciej Harat, Prof. Franciszek Lukaszczyk Memorial Oncology Center

Tumor Treating Fields (TTFields) Concomitant With Stereotactic Radiosurgery Based on FET-PET vs TTFields Alone for the Treatment of Recurrent, Glioblastoma (Tarrget 2.0)

This study evaluates whether the addition of FET-PET-guided stereotactic radiosurgery (SRS) to Tumor Treating Fields (TTFields) improves survival outcomes in patients with recurrent IDH-wildtype glioblastoma.

Patients with recurrent glioblastoma have limited treatment options and poor prognosis. TTFields is a non-invasive antimitotic therapy that has demonstrated efficacy in recurrent glioblastoma. Stereotactic radiosurgery is commonly used in selected patients with recurrent disease; however, treatment efficacy may be limited by the infiltrative nature of glioblastoma and challenges in accurate target delineation.

The study hypothesizes that combining TTFields with FET-PET-guided stereotactic radiosurgery will improve one-year overall survival compared with TTFields alone. Participants will be randomized in a 1:1 ratio to receive either TTFields plus stereotactic radiosurgery or TTFields alone.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Glioblastoma is the most common malignant primary brain tumor in adults and remains associated with poor prognosis despite multimodal treatment. There is currently no established standard therapy for recurrent glioblastoma, and outcomes remain unsatisfactory.

Tumor Treating Fields (TTFields) are low-intensity, intermediate-frequency alternating electric fields that disrupt mitosis and inhibit tumor growth. TTFields have demonstrated efficacy in recurrent and newly diagnosed glioblastoma with minimal systemic toxicity.

Stereotactic radiosurgery (SRS) is an established local treatment option for selected patients with recurrent glioblastoma. However, MRI-based target delineation may underestimate the true extent of infiltrative tumor growth. FET-PET imaging provides improved visualization of metabolically active tumor tissue and may improve treatment precision.

Preclinical studies suggest synergistic effects between TTFields and radiation therapy through increased radiosensitivity and modulation of DNA repair mechanisms. Additional immunomodulatory effects may further enhance treatment efficacy.

This prospective randomized single-center study will compare TTFields combined with FET-PET-guided stereotactic radiosurgery versus TTFields alone in patients with recurrent IDH-wildtype glioblastoma. The primary objective is to determine whether combined treatment improves the one-year overall survival rate.

Studientyp

Interventionell

Einschreibung (Geschätzt)

92

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

      • Bydgoszcz, Polen, 85-796
        • Rekrutierung
        • Department of Neurooncology and Radiosurgery, Franciszek Lukaszczyk Oncology Center

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

Inclusion Criteria:

  • Age ≥18 years
  • Karnofsky Performance Status ≥70
  • Histologically confirmed IDH-wildtype glioblastoma
  • First, second, or third recurrence
  • Radiological recurrence according to RANO 2.0 criteria
  • Prior radiotherapy and temozolomide treatment
  • At least 6 months since completion of previous radiotherapy
  • Contrast-enhancing recurrent lesion visible on MRI
  • Maximum recurrent lesion diameter ≤5 cm
  • Available molecular profile including IDH and MGMT status
  • Adequate hematologic, renal, and hepatic function
  • Written informed consent

Exclusion Criteria:

  • Previous bevacizumab treatment
  • Planned chemotherapy or targeted therapy after study intervention
  • Previous stereotactic re-irradiation within the planned treatment field
  • More than three recurrences
  • Significant psychiatric disorders
  • Significant unrelated neurological disease
  • Implanted pacemaker, defibrillator, deep brain stimulator, or other incompatible electronic device
  • Pregnancy or breastfeeding
  • Active intracranial hemorrhage
  • Uncontrolled hypertension
  • Severe renal dysfunction
  • Participation in another interventional study likely to interfere with this study

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: TTFields Plus FET-PET-Guided Stereotactic Radiosurgery
Participants receive Tumor Treating Fields (TTFields) therapy combined with FET-PET-guided stereotactic radiosurgery (SRS) for recurrent IDH-wildtype glioblastoma. TTFields treatment is administered for four months. Stereotactic radiosurgery is delivered within 14 days after initiation of TTFields according to protocol-defined target volumes based on MRI and FET-PET imaging.
Tumor Treating Fields (TTFields) therapy delivered using alternating electric fields through transducer arrays placed on the scalp. Treatment is administered continuously according to the study protocol for patients with recurrent IDH-wildtype glioblastoma.
Stereotactic radiosurgery planned using MRI and FET-PET imaging for treatment of recurrent IDH-wildtype glioblastoma. Radiosurgery is delivered within 14 days after initiation of TTFields according to protocol-defined target volumes.
Aktiver Komparator: TTFields Alone
Participants receive Tumor Treating Fields (TTFields) therapy alone for recurrent IDH-wildtype glioblastoma according to standard clinical practice. TTFields treatment is administered for four months.
Tumor Treating Fields (TTFields) therapy delivered using alternating electric fields through transducer arrays placed on the scalp. Treatment is administered continuously according to the study protocol for patients with recurrent IDH-wildtype glioblastoma.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
One-Year Overall Survival Rate
Zeitfenster: 12 months after randomization
Proportion of participants alive 12 months after randomization
12 months after randomization

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Overall Survival (OS)
Zeitfenster: From randomization until death from any cause, up to 81 months
Overall survival is defined as the time from randomization to death from any cause. Participants who are alive at the time of analysis will be censored at the date of last contact. Median overall survival will be estimated using the Kaplan-Meier method.
From randomization until death from any cause, up to 81 months
Progression-Free Survival (PFS)
Zeitfenster: Up to 12 months after randomization
Progression-free survival is defined as the time from randomization to radiographic disease progression according to RANO 2.0 criteria or death from any cause, whichever occurs first. Participants without an event will be censored at the date of last disease assessment. Median, 6-month, and 12-month progression-free survival rates will be estimated.
Up to 12 months after randomization
Objective Response Rate (ORR)
Zeitfenster: Up to 12 months after randomization
Objective response rate is defined as the proportion of participants achieving a complete response (CR) or partial response (PR) according to RANO 2.0 criteria within 12 months after randomization. Best overall response will be determined using serial MRI assessments.
Up to 12 months after randomization
Radiation-Induced Contrast Enhancement (RICE)
Zeitfenster: Up to 12 months after randomization
Radiation-induced contrast enhancement is defined as new or increasing contrast enhancement observed on follow-up MRI that subsequently remains stable or resolves without evidence of tumor progression. The incidence of radiation-induced contrast enhancement (RICE) will be assessed and compared between study groups.
Up to 12 months after randomization
Treatment-Related Adverse Events
Zeitfenster: From randomization through 12 months after randomization
Treatment-related adverse events will be assessed and graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0. The proportion of participants experiencing grade 3 or higher treatment-related adverse events will be compared between treatment groups.
From randomization through 12 months after randomization
Patterns of Failure
Zeitfenster: Up to 12 months after randomization
Patterns of failure will be evaluated based on the location of disease progression relative to the baseline recurrent tumor volume identified on screening MRI and treatment planning imaging. Disease progression will be classified as local, marginal, or distant.
Up to 12 months after randomization
Molecular Predictors of overall survival
Zeitfenster: Up to 81 months after randomization
Associations between molecular tumor characteristics, including MGMT promoter methylation status and other available molecular markers, and treatment outcomes will be evaluated to identify potential predictors of overall survival
Up to 81 months after randomization
Corticosteroid Requirements
Zeitfenster: From randomization until disease progression, up to 12 months after randomization
Corticosteroid requirements will be assessed as the cumulative and daily corticosteroid dose administered from randomization until disease progression. Changes in corticosteroid use over time will be compared between treatment groups.
From randomization until disease progression, up to 12 months after randomization

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Mitarbeiter

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

30. Dezember 2025

Primärer Abschluss (Geschätzt)

1. Juni 2030

Studienabschluss (Geschätzt)

1. Juni 2032

Studienanmeldedaten

Zuerst eingereicht

10. Juni 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

19. Juni 2026

Zuerst gepostet (Tatsächlich)

25. Juni 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

25. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

19. Juni 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • Tarrget 2.0

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

UNENTSCHIEDEN

Beschreibung des IPD-Plans

Individual participant data that underlie the results reported in publications may be made available upon reasonable request to the Principal Investigator, following approval of a research proposal and execution of a data sharing agreement

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Ja

Produkt, das in den USA hergestellt und aus den USA exportiert wird

Ja

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .